/* case-study.css — Individual case study page
   Editorial spread style. Magazine-like, big chart, pull quotes, honest "what we'd do differently".
*/

/* ============ Hero ============ */
.cs-hero {
  background: var(--white);
  padding: 144px 32px 80px;
  border-bottom: 1px solid var(--ink);
}
.cs-hero-inner { max-width: 1280px; margin: 0 auto; }

.cs-breadcrumb {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate-3);
  display: flex; gap: 8px; align-items: center;
  margin-bottom: 40px;
}
.cs-breadcrumb a { color: var(--slate-2); transition: color var(--d-fast) var(--ease-out); }
.cs-breadcrumb a:hover { color: var(--cobalt); }
.cs-breadcrumb .sep { color: var(--slate-3); }
.cs-breadcrumb .here { color: var(--ink); }

.cs-tagline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cobalt);
  margin-bottom: 32px;
  display: inline-flex; align-items: center; gap: 12px;
}
.cs-tagline::before {
  content: ""; width: 28px; height: 1px; background: currentColor;
}

.cs-hero h1 {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700;
  font-size: clamp(48px, 6vw, 96px);
  line-height: 0.96;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
  max-width: 18ch;
}
.cs-hero h1 em { font-style: normal; color: var(--cobalt); }

.cs-hero-foot {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border-strong);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
.cs-hero-foot .field .l {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-3);
}
.cs-hero-foot .field .v {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin-top: 8px;
  line-height: 1.3;
}
.cs-hero-foot .field .v em { font-style: normal; color: var(--cobalt); }
@media (max-width: 900px) {
  .cs-hero-foot { grid-template-columns: 1fr 1fr; gap: 24px; }
  .cs-hero { padding: 120px 20px 56px; }
}

/* ============ Numbers strip (the result, up-front) ============ */
.cs-result {
  border-bottom: 1px solid var(--ink);
  background: var(--bone);
}
.cs-result-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 1280px;
  margin: 0 auto;
}
.cs-result .n {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700;
  font-size: clamp(56px, 6vw, 88px);
  letter-spacing: -0.03em;
  line-height: 0.96;
  color: var(--ink);
}
.cs-result .n em { font-style: normal; color: var(--cobalt); }
.cs-result .cell {
  padding: 56px 40px;
  border-right: 1px solid var(--border-strong);
}
.cs-result .cell:last-child { border-right: 0; }
.cs-result .l {
  margin-top: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-2);
}
@media (max-width: 800px) {
  .cs-result-row { grid-template-columns: 1fr 1fr; }
  .cs-result .cell { padding: 40px 24px; border-bottom: 1px solid var(--border-strong); }
  .cs-result .cell:nth-child(2n) { border-right: 0; }
}

/* ============ Story sections ============ */
.cs-sec {
  padding: 96px 32px;
  border-top: 1px solid var(--border);
}
.cs-sec.cs-light { background: var(--white); }
.cs-sec.cs-bone { background: var(--bone); }
.cs-sec-inner {
  max-width: 1080px; margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2.2fr;
  gap: 80px;
  align-items: start;
}
.cs-sec .label {
  position: sticky; top: 96px;
}
.cs-sec .label .num {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700;
  font-size: 48px;
  letter-spacing: -0.024em;
  color: var(--cobalt);
  line-height: 1;
}
.cs-sec .label .ttl {
  margin-top: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate-3);
}
.cs-sec .body h2 {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700;
  font-size: clamp(28px, 3vw, 44px);
  letter-spacing: -0.025em;
  line-height: 1.06;
  color: var(--ink);
  margin: 0 0 32px;
  text-wrap: balance;
}
.cs-sec .body h2 em { font-style: normal; color: var(--cobalt); }
.cs-sec .body p {
  font-size: 18px;
  line-height: 1.65;
  color: var(--slate);
  margin: 0 0 20px;
  text-wrap: pretty;
}
.cs-sec .body p:last-child { margin: 0; }
.cs-sec .body p em { font-style: italic; color: var(--ink); }
.cs-sec .body p strong { font-weight: 600; color: var(--ink); }

.cs-sec .body p.lede {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 500;
  font-size: clamp(22px, 2vw, 26px);
  line-height: 1.45;
  color: var(--ink);
  margin-bottom: 28px;
}

@media (max-width: 900px) {
  .cs-sec { padding: 64px 20px; }
  .cs-sec-inner { grid-template-columns: 1fr; gap: 32px; }
  .cs-sec .label { position: static; display: flex; align-items: center; gap: 20px; }
  .cs-sec .label .ttl { margin-top: 0; }
}

/* ============ Pull quote ============ */
.cs-pull {
  margin: 40px 0;
  padding: 32px 40px;
  border-left: 4px solid var(--cobalt);
  background: var(--bone);
}
.cs-pull p {
  font-family: 'Inter Tight', sans-serif !important;
  font-weight: 500 !important;
  font-size: clamp(22px, 2vw, 26px) !important;
  line-height: 1.45 !important;
  color: var(--ink) !important;
  margin: 0 0 18px !important;
  text-wrap: pretty;
}
.cs-pull .attrib {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-2);
  display: flex; align-items: center; gap: 14px;
}
.cs-pull .attrib::before { content: ""; width: 32px; height: 1px; background: currentColor; }

/* ============ Steps list (what we did) ============ */
.cs-steps {
  display: flex; flex-direction: column;
  gap: 0;
  margin-top: 32px;
}
.cs-steps .step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 28px;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  align-items: start;
}
.cs-steps .step:first-child { border-top: 0; padding-top: 0; }
.cs-steps .step .n {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cobalt);
  font-weight: 500;
}
.cs-steps .step h3 {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.018em;
  color: var(--ink);
  margin: 0 0 10px;
}
.cs-steps .step p {
  font-size: 16px !important;
  line-height: 1.6 !important;
  color: var(--slate) !important;
  margin: 0 !important;
}

/* ============ Big chart ============ */
.cs-chart {
  margin: 32px 0;
  background: var(--navy);
  color: #fff;
  border-radius: var(--r-md);
  padding: 36px 40px 32px;
  position: relative;
  overflow: hidden;
}
.cs-chart::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 100% 0%, rgba(74,147,240,0.18), transparent 60%);
  pointer-events: none;
}
.cs-chart-h {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 28px;
  position: relative; z-index: 1;
}
.cs-chart-h h4 {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.012em;
  color: #fff;
  margin: 0;
}
.cs-chart-h .sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-top: 4px;
}
.cs-chart-h .legend {
  display: flex; gap: 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.cs-chart-h .legend .item { display: inline-flex; align-items: center; gap: 6px; color: rgba(255,255,255,0.65); }
.cs-chart-h .legend .item::before {
  content: ""; width: 12px; height: 2px;
}
.cs-chart-h .legend .item.tg3::before { background: #4A93F0; }
.cs-chart-h .legend .item.bench::before {
  background: linear-gradient(to right, rgba(255,255,255,0.5) 0 4px, transparent 4px 8px);
  background-size: 8px 2px;
  background-repeat: repeat-x;
  height: 2px;
  border-top: 2px dashed rgba(255,255,255,0.5);
  background: transparent;
}

.cs-chart-body { position: relative; z-index: 1; }
.cs-chart-foot {
  position: relative; z-index: 1;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.12);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cs-chart-foot .stat .n {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700;
  font-size: 24px;
  letter-spacing: -0.018em;
  color: #fff;
  line-height: 1;
}
.cs-chart-foot .stat .n em { font-style: normal; color: var(--cobalt-bright); }
.cs-chart-foot .stat .l {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-top: 6px;
}

/* ============ KPI tiles inside body ============ */
.cs-kpis {
  margin: 32px 0;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}
.cs-kpis .kpi {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 22px;
  background: var(--white);
}
.cs-kpis .kpi .l {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate-3);
}
.cs-kpis .kpi .n {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700;
  font-size: 30px;
  letter-spacing: -0.022em;
  line-height: 1;
  color: var(--ink);
  margin-top: 12px;
}
.cs-kpis .kpi .n em { font-style: normal; color: var(--cobalt); }
.cs-kpis .kpi .desc {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate-2);
}
@media (max-width: 800px) { .cs-kpis { grid-template-columns: 1fr; } }

/* ============ Honest section · what we'd do differently ============ */
.cs-honest .body h2 em { color: var(--cobalt); }
.cs-honest .lessons {
  margin-top: 32px;
  display: flex; flex-direction: column; gap: 0;
}
.cs-honest .lesson {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-top: 1px solid var(--border-strong);
  align-items: start;
}
.cs-honest .lesson:first-child { border-top: 0; padding-top: 0; }
.cs-honest .lesson .mark {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  color: var(--cobalt);
  line-height: 1.2;
}
.cs-honest .lesson .body-l {
  font-size: 16px;
  line-height: 1.6;
  color: var(--slate);
}
.cs-honest .lesson .body-l strong { color: var(--ink); font-weight: 600; }
.cs-honest .lesson .body-l em { font-style: italic; color: var(--ink); }

/* ============ Next case + CTA strip ============ */
.cs-next {
  background: var(--bone);
  border-top: 1px solid var(--border);
  padding: 64px 32px;
}
.cs-next-inner {
  max-width: 1280px; margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.cs-next-tile {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 32px;
  display: flex; flex-direction: column;
  transition: border-color var(--d-fast) var(--ease-out);
}
.cs-next-tile:hover { border-color: var(--cobalt); }
.cs-next-tile .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate-3);
  margin-bottom: 18px;
}
.cs-next-tile h3 {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700;
  font-size: 24px;
  letter-spacing: -0.018em;
  color: var(--ink);
  margin: 0 0 18px;
  text-wrap: balance;
}
.cs-next-tile p {
  font-size: 15px;
  line-height: 1.5;
  color: var(--slate-2);
  margin: 0 0 24px;
}
.cs-next-tile .lnk {
  margin-top: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cobalt);
  display: inline-flex; align-items: center; gap: 8px;
}
.cs-next-tile .lnk .arrow { transition: transform var(--d-fast) var(--ease-out); }
.cs-next-tile:hover .lnk .arrow { transform: translateX(4px); }
@media (max-width: 700px) {
  .cs-next-inner { grid-template-columns: 1fr; }
}